101142021 has 8 divisors (see below), whose sum is σ = 134974944. Its totient is φ = 67368560.

The previous prime is 101142007. The next prime is 101142023. The reversal of 101142021 is 120241101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101142021 - 2¹⁰ = 101140997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101141988 and 101142006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101142023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10731 + ... + 17816.

It is an arithmetic number, because the mean of its divisors is an integer number (16871868).

Almost surely, 2^101142021 is an apocalyptic number.

It is an amenable number.

101142021 is a deficient number, since it is larger than the sum of its proper divisors (33832923).

101142021 is a wasteful number, since it uses less digits than its factorization.

101142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29731.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 101142021 is about 10056.9389478111. The cubic root of 101142021 is about 465.9191301149.

Adding to 101142021 its reverse (120241101), we get a palindrome (221383122).

The spelling of 101142021 in words is "one hundred one million, one hundred forty-two thousand, twenty-one".